Dimethylformamide → tert-butyl {(1S)-2-[(6-{6-[(3,3-difluorocyclobutyl)methoxy]-1,3-benzoxazol-2-yl}-5-fluoropyridin-3-yl)oxy]-1-methylethyl}carbamate

HRID 1026348Notes

Reaction equation

HRID 1026348 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([O:18][CH2:19][C@@H:20]([NH:22][C:23](=[O:29])[O:24][C:25]([CH3:28])([CH3:27])[CH3:26])[CH3:21])[CH:5]=[N:6][C:7]=1[C:8]1[O:9][C:10]2[CH:16]=[C:15]([OH:17])[CH:14]=[CH:13][C:11]=2[N:12]=1.CS(O[CH2:35][CH:36]1[CH2:39][C:38]([F:41])([F:40])[CH2:37]1)(=O)=O.C(=O)([O-])[O-].[K+].[K+].CN(C=O)C>O>[F:40][C:38]1([F:41])[CH2:39][CH:36]([CH2:35][O:17][C:15]2[CH:14]=[CH:13][C:11]3[N:12]=[C:8]([C:7]4[N:6]=[CH:5][C:4]([O:18][CH2:19][C@@H:20]([NH:22][C:23](=[O:29])[O:24][C:25]([CH3:28])([CH3:27])[CH3:26])[CH3:21])=[CH:3][C:2]=4[F:1])[O:9][C:10]=3[CH:16]=2)[CH2:37]1

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium Carbonate2×HCID 582234121132843-09-42×HCID 136372365tert-butyl [(1S)-2-{[5-fluoro-6-(6-hydroxy-1,3-benzoxazol-2-yl)pyridin-3-yl]oxy}-1-methylethyl]carbamate

Product 1

HCID 86666323tert-butyl {(1S)-2-[(6-{6-[(3,3-difluorocyclobutyl)methoxy]-1,3-benzoxazol-2-yl}-5-fluoropyridin-3-yl)oxy]-1-methylethyl}carbamateYield 80.5%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of tert-butyl [(1S)-2-{[5-fluoro-6-(6-hydroxy-1,3-benzoxazol-2-yl)pyridin-3-yl]oxy}-1-methylethyl]carbamate (770 mg), (3,3-difluorocyclobutyl)methyl methanesulfonate (459 mg), potassium carbonate (317 mg), and DMF (10 mL) was stirred at 60° C. for 2 hr. Then additional (3,3-difluorocyclobutyl)methyl methanesulfonate (459 mg) and potassium carbonate (317 mg) were added, and the mixture was stirred at 60° C. overnight. Water was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to give the title compound (780 mg) as a white solid.

Workup

  1. stirringthe mixture was stirred at 60° C. overnight
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-8e873510338f45ff87df204c07ac6ce7
Source dataset
uspto-grants-2014_05
Patent number
US08729102B2

Reaction notes

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